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hnsdv_create_qp - Man Page

creates a HNS specific queue pair (QP)

Synopsis

#include <infiniband/hnsdv.h>

struct ibv_qp *hnsdv_create_qp(struct ibv_context *context,
                               struct ibv_qp_init_attr_ex *qp_attr,
                               struct hnsdv_qp_init_attr *hns_attr);

Description

hnsdv_create_qp() creates a HNS specific queue pair (QP) with specific driver properties.

Arguments

Please see ibv_create_qp_ex(3) man page for context and qp_attr.

hns_attr

struct hnsdv_qp_init_attr {
        uint64_t comp_mask;
        uint32_t create_flags;
        uint8_t congest_type;
        uint8_t reserved[3];
};

comp_mask

Bitmask specifying what fields in the structure are valid:

HNSDV_QP_INIT_ATTR_MASK_QP_CONGEST_TYPE:
    Valid values in congest_type. Allow setting a congestion control algorithm for QP.

create_flags

Enable the QP of a feature.

congest_type

Type of congestion control algorithm:

HNSDV_QP_CREATE_ENABLE_DCQCN: Data Center Quantized Congestion Notification HNSDV_QP_CREATE_ENABLE_LDCP: Low Delay Control Protocol HNSDV_QP_CREATE_ENABLE_HC3: Huawei Converged Congestion Control HNSDV_QP_CREATE_ENABLE_DIP: Destination IP based Quantized Congestion Notification

Return Value

hnsdv_create_qp() returns a pointer to the created QP, on error NULL will be returned and errno will be set.

Author

Junxian Huang <huangjunxian6@hisilicon.com>

Info

2024-02-06 HNS Programmer’s Manual